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Vishay General Semiconductor - Diodes Division SMBJ30CAHE3_B/I
- Part No.:
- SMBJ30CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CAHE3_B/I.pdf
- Description:
- 600W,30V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,599
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Product details
Overview
SMBJ30CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 30 V standoff voltage (VWM), 48.4 V maximum clamping voltage at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ30CAHE3_B/I datasheet, SMBJ30CAHE3_B/I pinout, SMBJ30CAHE3_B/I application, or SMBJ30CAHE3_B/I equivalent, key selection criteria include bidirectional surge suppression capability, AEC-Q101 qualification status, clamping voltage vs. operating voltage margin, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance, enabling fast response (<1 ns) to transient events such as ESD, lightning-induced surges, and inductive switching spikes.
The SMBJ30CAHE3_B/I is rated for -55 °C to +150 °C junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 1.0 µA max reverse leakage at 30 V (VWM) supports low-power system integrity, while the 0.099 %/°C temperature coefficient of VBR ensures predictable voltage threshold drift across operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min / max | 33.3 V / 36.8 V at 1.0 mA IT - verified breakdown voltage range ensuring reliable turn-on during transients. |
| VC @ IPPM | 48.4 V at 12.4 A - clamping voltage under 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - peak pulse power handling capacity; defines transient energy absorption limit without failure. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance; informs required PCB copper area and layout for thermal management. |
| TJ max | +150 °C - maximum junction temperature; sets upper boundary for reliability under sustained power dissipation or ambient heat. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either direction; connects to line being protected. |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or reference rail during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like ISO 7637-2 Pulse 5a without derating in compact SMB footprint. |
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units and ADAS sensor interfaces requiring long-term field reliability. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-related popcorn failure risk. |
| Glass passivated junction | Ensures stable avalanche characteristics over lifetime and improved resistance to humidity-induced parameter shift. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback signal lines against inductive kickback from IGBT/MOSFET switching in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across isolated signal paths or low-side current sense inputs. Use Value: Limits transient overshoot to ≤48.4 V, preventing latch-up or oxide damage in precision analog front-ends operating near 3.3 V or 5 V rails. |
Use Scenario: Surge suppression on LIN bus or analog output lines of pressure/temperature sensors in engine compartments. IC Role / Device Role / Timing Role: Standoff-mode protector mounted directly at connector entry point before signal conditioning circuitry. Use Value: Withstands repeated 10/1000 µs pulses up to 600 W while maintaining <1.0 µA leakage at 30 V, preserving sensor accuracy and battery drain budget. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Secondary-side transient suppression on 48 V DC power distribution lines feeding remote radio units or PoE injectors. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to absorb lightning-induced common-mode surges. Use Value: Clamps 12.4 A surge within 48.4 V, compatible with 48 V nominal systems where headroom above VWM must exceed 10 V for safety margin. |
Use Scenario: Bidirectional overvoltage protection on CC and SBU pins of USB-C receptacles exposed to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) TVS placed adjacent to connector to minimize stub length and preserve signal integrity. Use Value: Fast sub-nanosecond response and symmetric clamping ensure equal protection for both plug orientations without polarity dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CAHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct substitution where halogen-free bill-of-materials is required; same thermal and electrical performance. |
| SMAJ30CAHE3_A/H | Lower power rating (400 W PPPM), SMA package (smaller footprint), higher RθJA (140 °C/W), same VWM/VC. | Suitable only for lower-energy transients or space-constrained designs where 600 W margin is not needed. | Choose when board space is critical and surge threat level is reduced; requires thermal redesign due to higher thermal resistance. |
Compared with SMBJ30CAHE3_B/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMAJ30CAHE3_A/H trades 33 % lower pulse power and higher thermal resistance for 30 % smaller PCB area - making it viable only in thermally relaxed, low-surge environments.
Availability
SMBJ30CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feeds requiring stable component supply with AEC-Q101 validation and consistent tape-and-reel delivery.
Supply support for SMBJ30CAHE3_B/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What does the "CA" suffix indicate in SMBJ30CAHE3_B/I?
The "CA" suffix denotes a bidirectional configuration: SMBJ30CAHE3_B/I conducts and clamps symmetrically in both polarities, unlike unidirectional "A" variants that require correct cathode orientation. This makes SMBJ30CAHE3_B/I ideal for AC-coupled lines, differential buses, or any application where voltage polarity reversal may occur during transients.
Is SMBJ30CAHE3_B/I suitable for automotive applications?
Yes - SMBJ30CAHE3_B/I carries AEC-Q101 qualification, confirming compliance with stress tests including temperature cycling, high-temperature reverse bias, and ESD robustness required for automotive electronics. It is commonly deployed in body control modules, sensor hubs, and infotainment power supplies where transient immunity is critical.
What is the maximum clamping voltage of SMBJ30CAHE3_B/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ30CAHE3_B/I is 48.4 V at 12.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and represents the highest voltage seen across the device during worst-case transient events.
How does the HE3 suffix differ from E3 or M3 in SMBJ30CAHE3_B/I?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from "E3" (RoHS commercial grade only) and "HM3" (halogen-free + AEC-Q101). All three share identical electrical parameters, but HE3 ensures automotive-grade reliability validation alongside environmental compliance.
Can SMBJ30CAHE3_B/I be used in place of a unidirectional TVS diode?
No - SMBJ30CAHE3_B/I is strictly bidirectional and lacks polarity marking; substituting it for a unidirectional part (e.g., SMBJ30AHE3_B/I) risks improper clamping behavior in DC-biased circuits. Use only where symmetrical protection is required, such as AC signal lines or floating references.
SMBJ30CAHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ30CAHE3_B/I FAQ
1.How can I place an order for SMBJ30CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CAHE3_B/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ30CAHE3_B/I reliable?
The price and inventory of SMBJ30CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ30CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CAHE3_B/I?
SMBJ30CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CAHE3_B/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ30CAHE3_B/I?
For technical support, including SMBJ30CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ30CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ30CAHE3_B/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ30CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ30CAHE3_B/I?
All SMBJ30CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CAHE3_B/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ30CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ30CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CAHE3_B/I Tags
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